Using a clay bar will remove embedded surface contamination that still remains after a maintenance wash. Sometimes the contamination removed is not always visible on the paint to the naked eye. After using a clay bar on your paint you will be left with a surface that is as smooth as glass and properly prepped. A clay job should be followed up with a polish, or just a wax to protect the paint. A common misconception about using a clay bar is that it has an impact on removing swirls and scratches, it does not. We recommend using a clay bar at least twice a year.